The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 2014
Filed:
Jul. 08, 2009
Applicants:
Toshiyuki Tsubouchi, Sodegaura, JP;
Yoshio Hironaka, Sodegaura, JP;
Inventors:
Toshiyuki Tsubouchi, Sodegaura, JP;
Yoshio Hironaka, Sodegaura, JP;
Assignee:
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C10M 129/68 (2006.01);
U.S. Cl.
CPC ...
Abstract
A pressure transmission medium contains an ester or an ether having two or more ring structures of an aromatic ring or a saturated naphthenic ring as a pressure transmission medium base oil. The pressure transmission medium that exhibits low energy loss due to compression, excellent response in a hydraulic circuit, energy-saving, high-speed operation and high precision of control in a hydraulic circuit, a low viscosity and a low churning resistance, and a hydraulic device can be provided.